pcl_conversions

CMake Error at /opt/ros/melodic/share/catkin/cmake/catkinConfig.cmake:83 (find_package):
Could not find a package configuration file provided by “pcl_conversions”
with any of the following names:

pcl_conversionsConfig.cmake
pcl_conversions-config.cmake

Add the installation prefix of “pcl_conversions” to CMAKE_PREFIX_PATH or
set “pcl_conversions_DIR” to a directory containing one of the above files.
If “pcl_conversions” provides a separate development package or SDK, be
sure it has been installed.
Call Stack (most recent call first):
CMakeLists.txt:54 (find_package)

这里我是用的是Melodic版本,使用的是什么版本就替换即可
解决：sudo apt-get install ros-melodic-pcl-conversions